Camassias produce tall elegant spires of blue or white flowers in April and May, and the bulbs should be planting in autumn, in borders or naturalised in grass. In this video guide from Gardeners’ World, Monty Don explains what conditions these North American perennials need and shows you how to plant white-flowered Camassia leichtlinii ‘Alba’ using a bulb planter. Watch now for full details, including which way up to plant the bulbs and how deep to bury them.